RICHARD DIAMOND PRIVATE DETECTIVE - TV SERIES - 1957 - DAVID JANSSEN - 13 DVDSRICHARD DIAMOND PRIVATE DETECTIVE TV SERIES 1957 DAVID JANSSEN 13 DVDS Richard Diamond is a suave private investigator, who, at first, walks the mean streets of New York City, then later packs up and moves to Los Angeles, California, where he tools around in a convertible with a car phone. His sexy receptionist Sam, whose face we never see, minds the office, while Diamond solves his cases. Stars: David Janssen, Roxane Brooks, Russ Conway. 77 EPISODES.